Nut-lock



J. B. WORD.

NUT LOCK.

APPLICAHON FiLED OCLI. 1919.

Patented Apr. 20, 1920.

F/E b.

Amurnnlu threads, which section,

zen of the United UNITED STATES PATENT OFFICE.

JOHN B. wom), or Larson, cALIi onNIA, assreuon or ONE-THIRD TO WILLIAM a. BECKERS AND ONE-THIRD 'ro CHARLES M. SUMNER. BOTH OF PLAOERVILLE, cam- FOBNIA.

NUT-LOCK.

Specification of Letter Patent.

Patented Apr. 20, 1920.

Application filed Qc tober 7, 1919. Serial No. 329,009.

To all whom it may concern Beit known that I JOHN B. Worm, a cititates, residing at Laof Eldorado and State of California, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

My invention relates to that class of nutlocks in which a cramping or binding pressure is brought upon the bolt-threads by means of a movable section of the nut due to a slight initial promotion from the fare of the nut is forced inwardly by contact with a fixed abutment against which the nut is set up, so that the threads of said section are thrown out of coincidence or register with the threads of the nut, and thereby bind on the bolt.

The common form of this type of nutlock comprises an independent segment, section or gib, slidahly seated in a groove in the nut, and initially set to project from the nut-face. This construction requires rather accurate and relatively expensive machining, and has not found favor, for this and other reasons, as for example the chance of the independent movable section or gib heingl misplaced or lost.

trobe, in the county he obJect of my invention is to provide a simple, effective and inexpensive nut-look, in which the cramping or binding section of the nut is integral therewith and bears such relation thereto that the contact of the fixed abutment against which it bears will force aid section to a binding pressure upon the olt threads both in a direction parallel with the bolt axis and at right angles there to, said section being also adapted to release by its inherent resilience. its cramping effect on the bolt threads, when relieved of the contact oressure of the fixed abutment. To this end my invention consists in the novel nut-lock which I shall now fully describe, by reference to the accompanying drawings in which,

Figure 1 is an elevation of a nut formed with my novel lock.

Fig. 2 is an elevation of the same at right an les to Fig. 1.

ig. 3 is a section on the line 3-3 of Fig. 1.

ig. 4 is a section on the line 44 of Fig. '2.

The nut 1 has a section 2 which, at one extremity, is integral with the nut, as seen in Figs. 4 and (3. At its other extremityfiijt is severed from the nut by a cut 3 perpendicular to the face of the nut, and at its back it is severed from the nut by a cut 4 at an angle to the face of the nut and slop log inwardly to the tapped or threaded bore,

a distance of a few threads, say tour, as seen in Figs. 3 and 4 of the drawings. The cuts 3 and l join, so that the section 2 is sewred except at a triangular portion at one extremitv where it is still integral with the nut. From this unsevere portion the surface of the section 2 rises from the face of the not on an incline, and at its severed extremity it lies appreciably above the nut face. There may be one or more of these sections 2 in each nut. For illustration I have here shown two, symmetrical and opposite. In a hexagonal nut three would present a good distribution; and even four might be used in a square nut. The internal threads 5 of the nut bore are continuous and uniform in both nut body and raised sections, that is to say they are coincident and register. In practice the nutblank after it is stamped out and is still hot is fitted to a tool in which it is securely clamped while angular ehisels or knives are pressed into the red hot blank to form the cuts 3 and 4, during and by which operation the sections 2 are elevated or pressed up from the not face. Then with the blank thus treated and the partially severed sections 2 inclining from its face, said blank is tapped to form the interior threads continuously and coinciding in both the nut proper and the sections 2.

It will now be seen that if pressure be applied to the face of the sections 2, said sections will yield about their integral extremity acting as a sprin hinge. The yielding of the sections will be the component of two directions namely, one parallel with the nutaxis and the other at an angle thereto, due to the sloping cut 4. It follows that the sect ons 2 moving on their inwardly sloping back walls at 4 cause their threads to move out of register or coincidence with the three. or i ill) threads-ai the nut body. Therefore, when the nut 1 is fitted on the bolt 6, as in Fig. 5, and is set up to a fixed abutment, such for example as the plate 7 on said bolt, the contact of the inclined faces oi the i at sections 2 with said plate 7, will force sid sections in, thereby causing their threads to' cramp in the threads of the bolt both .longitlnlinally and laterally, and this presmirc finds resistance both from the plate 7 and from the wall of the nut at l in whieh the partially severed section lies. As the pressure of the plate 7 is relieved by turning back the nut, the spring of the integral joint of the section 2 tendsto throw said Section out again and relieve the cramping pressure of its threadson the bolt threads.-

I claim: 1

1. In a nut-lock, a nut a section of the threaded bore of which is raised from the nut face on an incline, said section being severed from the nut at one extremity h a cut perpendicular to the nut face and at its hack-by a cut inclining inwardly to the bore, and eaid htfCllUll being integral with the nut at its other extremity, whereby the section by pressure contact with a fixed ahutmvntpu a bolt will be turned on its intogral extremity downwardly and inwardly to bind its threads in the threads of the holt. 2. In a llllt-hwh a nut formed with a threz'lded section of its horc partially sov- (-l'cd from its Face by anend cut perpendicular to the nut face and a back cut joining the cud cut and inclining inwardly into the nut bore, and at its other end living integral with the nut, said section being elevated from the I utface on an incline from its integral to its at end, the threads in said nut and its aiscd auction normally coinciding. I ln tcstimony whereof I have signed my name to this specification in the presence of two subscribing witnesses. 4

JOHN B. VVUlil).

l\"itnes: es:

W M. h. Boo'rn, D. B. RICHARDS. 

